Masaru Kunikata

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Shimizu, JP

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Patents Grantslast 30 patents

Information Patent Grant
High-rigidity sheet-metal structure
- Patent number 5,564,247
- Issue date Oct 15, 1996
- Hitachi, Ltd.
- Keiichi Nakamura
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...